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AppGameKit Classic Chat / Help! How to calculate elapsed seconds between two times and dates?

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IBOL
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Posted: 10th May 2017 14:04
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Hi, all, i need some conceptual help.

This is for an "incremental game" (clicker game) prototype : the kind where you do something and it takes 20 seconds to complete, or you get +9 metal per second.
In these games, you make progress even while you are *NOT* actively playing.

I do *not* want to use "getmilliseconds()" for this, since users might close and reopen the app, and i want the actual time elapsed since they last played.

So AppGameKit reports time and date like this:
09:01:52
2017-05-10

I can't wrap my head around how to calculate the difference in time (base 24/60/60) ,
and then the date is even worse, with variable-length months...

I googled this, and found lots of ways to do it using built-in commands in other languages, but nothing about how it's actually *accomplished*

so, insight?

Thanks!
Bob
http://ibology.org/
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JohnnyMeek
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Location: Slovenia
Posted: 10th May 2017 14:24
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use something like this...


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Kevin Picone
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Posted: 10th May 2017 14:41
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what happens if a user changes the system time/date ?


PlayBASIC To HTML5/WEB - Convert PlayBASIC To Machine Code
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IBOL
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Posted: 10th May 2017 14:48
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@JohnnyMeek :

That is exactly the sort of thing i need, and i did not know about it. THANK YOU!

@Kevin Picone :

That is something in the back of my mind, but accurate timekeeping was more important.

I suppose i could write times and dates to a file, where the latest (most futuristic) time+date would be saved,
and if the user ever accessed the game at a time that was BEFORE that "latest time",
the game would not accept it. That should never happen if someone does *not* mess with their clock, except possibly on "time change days" in USA...
- although i'm not sure what form the "punishment" should take.

Thanks all!
http://ibology.org/
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Mobiius
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Posted: 10th May 2017 15:42
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"time change days" occur usually at 0300 in the morning officially, so shouldn't be a problem, unless the player is currently playing the app at, or around the time. It's only twice a year, so shouldn't be a big issue.
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